Pipe joining material for connecting pipes

• US 9,732,256 B2
• Filed: 08/28/2014
• Issued: 08/15/2017
• Est. Priority Date: 09/27/2013
• Status: Active Grant

• Current Assignee: Omachron Intellectual Property Inc.
• Original Assignee: Omachron Intellectual Property Inc.
• Inventors: Conrad, Nina, Burke, Brian, Vivian, Don, Millman, Allan, Conrad, Wayne Ernest
• Primary Examiner(s): Woodward, Ana
• Application Number:
  US14/472,147
• Publication Number:
  US 20150094426A1
• Time in Patent Office: 1,083 Days
• Field of Search: None
• CPC Class Codes: B29C 65/42 between pre-assembled parts B29C65/605 takes precedence
• CPC Class Codes: B29C 65/425 characterised by the composition of the molten plastics applied between pre-assembled parts
• CPC Class Codes: B29C 65/4815 Hot melt adhesives, e.g. thermoplastic adhesives
• CPC Class Codes: B29C 65/542 by injection
• CPC Class Codes: B29C 66/02242 Perforating or boring
• CPC Class Codes: B29C 66/1122 Single lap to lap joints, i.e. overlap joints B29C66/45, B29C66/472, B29C66/52272 take precedence
• CPC Class Codes: B29C 66/1222 comprising at least a lapped joint-segment
• CPC Class Codes: B29C 66/1224 comprising at least a butt joint-segment
• CPC Class Codes: B29C 66/322 Providing cavities in the joined article to collect the burr
• CPC Class Codes: B29C 66/342 Preventing air-inclusions
• CPC Class Codes: B29C 66/5221 for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
• CPC Class Codes: B29C 66/5229 involving the use of a socket
• CPC Class Codes: B29C 66/52292 said stop being internal
• CPC Class Codes: B29C 66/71 characterised by the composition of the plastics material of the parts to be joined welding bar compositions B29C65/125
• CPC Class Codes: B29C 66/73921 characterised by the materials of both parts being thermoplastics
• CPC Class Codes: B29C 66/8167 Quick change joining tools or surfaces
• CPC Class Codes: B29C 66/8181 characterised by the cooling constructional aspects
• CPC Class Codes: B29C 66/861 Hand-held tools
• CPC Class Codes: B29C 66/8618 being battery operated
• CPC Class Codes: B29C 66/9121 by measuring the temperature
• CPC Class Codes: B29C 66/91216 : enabling contactless temperature measurements, e.g. using a pyrometer
• CPC Class Codes: B29C 66/91221 : of the parts to be joined
• CPC Class Codes: B29C 66/91231 : of the joining tool
• CPC Class Codes: B29C 66/919 : characterised by specific temperature, heat or thermal flux values or ranges specific electrical resistance values B29C66/81262
• CPC Class Codes: B29C 66/9221 : by measuring the pressure, the force or the mechanical power
• CPC Class Codes: B29C 66/9674 : involving special data outputs, e.g. special data display means B29C66/8748 takes precedence
• CPC Class Codes: B29K 2023/06 : PE, i.e. polyethylene
• CPC Class Codes: B29K 2023/083 : EVA, i.e. ethylene vinyl acetate copolymer
• CPC Class Codes: B29K 2027/06 : PVC, i.e. polyvinylchloride
• CPC Class Codes: B29K 2055/02 : ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
• CPC Class Codes: B29L 2031/737 : Articles provided with holes, e.g. grids, sieves nets B29L2028/00
• CPC Class Codes: C08L 27/06 : Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08L 77/00 : Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C09J 127/06 : Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C09J 177/00 : Adhesives based on polyamides obtained by reactions forming a carboxylic amide link in the main chain based on polyhydrazides C09J179/06; based on polyamide-imides C09J179/08; Adhesives based on derivatives of such polymers
• CPC Class Codes: F16L 47/02 : Welded joints; Adhesive joints

Abstract

A pipe joining material for connecting pipes and fittings and a method of making a pipe joining material are provided. The pipe joining material may include a thermoplastic material such as polyvinyl chloride (PVC) and/or chlorinated polyvinyl chloride (CPVC) and a bonding agent for the thermoplastic material.

Claims

1. A method of joining parts of a piping system comprising:

(a) providing a first pipe or pipe fitting;

(b) providing a second pipe or pipe fitting; and

,

(c) joining the first pipe or pipe fitting to the second pipe or pipe fitting by inserting the first pipe or pipe fitting into the second pipe or pipe fitting whereby a gap is positioned between an outer surface of the first pipe or pipe fitting and an inner surface of the second pipe or pipe fitting and injecting into the gap a liquid pipe joining material comprising;

(i) a thermoplastic material comprising at least one of polyvinyl chloride and chlorinated polyvinyl chloride, wherein the thermoplastic material comprises over 75% by weight of the pipe joining material based on the total weight of the pipe joining material;

(ii) a bonding agent for the thermoplastic material selected from the group consisting of polyamide, ethylene acrylate copolymer, ethylene vinyl acetate (EVA) copolymer, polyurethane, polyester, polyolefin, polycaprolactone, soy protein and styrene block co-polymer,

wherein the pipe joining material secures the first pipe or pipe fitting to the second pipe or pipe fitting.

2. The method of claim 1, further comprising the steps of:

(1) heating a mixture of the thermoplastic material and the bonding agent to a forming temperature and shaping the mixture at the forming temperature;

(2) cooling the shaped mixture to a temperature below the forming temperature to obtain a solid pipe joining material; and

(3) subsequently liquefying the solid pipe joining material to obtain the liquid pipe joining material,

wherein steps (1) and (2) are performed before step (c).

3. The method of claim 2, further comprising selecting the pipe joining material to be solid at an ambient temperature and fluid at an application temperature.

4. The method of claim 2, further comprising selecting the pipe joining material to be solid at an ambient temperature and fluid at an application temperature that is higher than the forming temperature.

5. The method of claim 1, wherein a mixture of the thermoplastic material and the bonding agent is shaped into the form of a cylindrical tube or stick before step (c) and the method further comprises liquefying the cylindrical tube or stick to obtain the liquid pipe joining material.

6. The method of claim 1, further comprising selecting the pipe joining material to be solid at an ambient temperature and fluid at an application temperature between 60 to 200°

C.

7. The method of claim 1, further comprising selecting the pipe joining material to be solid at an ambient temperature and fluid at an application temperature between 100 to 150°

C.

8. The method of claim 1, wherein the bonding agent comprises polyimide.

9. The method of claim 1, wherein the first pipe or pipe fitting is made of PVC or CPVC and the second pipe or pipe fitting is made of PVC or CPVC.